constify property names constructors (#7294)

Baked constructors should be `const`.

Author: robertbastian

CHANGELOG.md

@@ -8,6 +8,7 @@
         - Add `IndicConjunctBreak` (unicode-org#7280)
         - Add conversion between `icu::properties::props::Script` and `icu::locale::subtags:Script` (unicode-org#7270)
         - Add conversion between `icu::properties::props::BidiClass` and `unicode_bidi::BidiClass` (unicode-org#7272)
+        - Constify `PropertyNamesLong`/`PropertNamesShort`/`PropertyParser` constructors (unicode-org#7294)
 - Utils
   - Retire the `icu_harfbuzz` crate. The `icu_properties` and `icu_normalizer` types now directly implement the `harfbuzz-traits`
 

components/properties/src/names.rs

@@ -86,7 +86,7 @@ impl<T> PropertyParser<T> {
     /// [📚 Help choosing a constructor](icu_provider::constructors)
     #[cfg(feature = "compiled_data")]
     #[expect(clippy::new_ret_no_self)]
-    pub fn new() -> PropertyParserBorrowed<'static, T>
+    pub const fn new() -> PropertyParserBorrowed<'static, T>
     where
         T: ParseableEnumeratedProperty,
     {
@@ -255,7 +255,7 @@ impl<T: TrieValue> PropertyParserBorrowed<'static, T> {
     ///
     /// [📚 Help choosing a constructor](icu_provider::constructors)
     #[cfg(feature = "compiled_data")]
-    pub fn new() -> Self
+    pub const fn new() -> Self
     where
         T: ParseableEnumeratedProperty,
     {
@@ -383,7 +383,7 @@ impl<T: NamedEnumeratedProperty> PropertyNamesLong<T> {
     /// [📚 Help choosing a constructor](icu_provider::constructors)
     #[cfg(feature = "compiled_data")]
     #[expect(clippy::new_ret_no_self)]
-    pub fn new() -> PropertyNamesLongBorrowed<'static, T> {
+    pub const fn new() -> PropertyNamesLongBorrowed<'static, T> {
         PropertyNamesLongBorrowed::new()
     }
 
@@ -447,7 +447,7 @@ impl<T: NamedEnumeratedProperty> PropertyNamesLongBorrowed<'static, T> {
     ///
     /// [📚 Help choosing a constructor](icu_provider::constructors)
     #[cfg(feature = "compiled_data")]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self {
             map: T::SINGLETON_LONG,
         }
@@ -516,7 +516,7 @@ impl<T: NamedEnumeratedProperty> PropertyNamesShort<T> {
     /// [📚 Help choosing a constructor](icu_provider::constructors)
     #[cfg(feature = "compiled_data")]
     #[expect(clippy::new_ret_no_self)]
-    pub fn new() -> PropertyNamesShortBorrowed<'static, T> {
+    pub const fn new() -> PropertyNamesShortBorrowed<'static, T> {
         PropertyNamesShortBorrowed::new()
     }
 
@@ -620,7 +620,7 @@ impl<T: NamedEnumeratedProperty> PropertyNamesShortBorrowed<'static, T> {
     ///
     /// [📚 Help choosing a constructor](icu_provider::constructors)
     #[cfg(feature = "compiled_data")]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self {
             map: T::SINGLETON_SHORT,
         }